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Finding the Fourth Proportional to 162.18, 243.15 and 147.09

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Solution

The fourth proportional to 162.18, 243.15 and 147.09 is: 220.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.18 : 243.15 = 147.09 : x
  2. Step 2: Convert to fraction form
    162.18/243.15 = 147.09/x
  3. Step 3: Cross multiply
    162.18x = 243.15 × 147.09
  4. Step 4: Simplify right side
    162.18x = 35,764.93
  5. Step 5: Solve for x
    x = 35,764.93/162.18
  6. Step 6: Final answer
    x = 220.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.